Fluid Concepts
1. Find the density in kg/meters
cubed of regular and irregular shaped objects
using formulas for volume when given dimensions in centimeter or
millimeters. Ex 50 kg spherical rock with 200 mm diameter. Or 10 kg cube 50 cm on each side. Irregular objects would require displacement in
water data to find volume. Ex Vol 1 = .000423 m cubed and v2 = .000560 m cubed and its mass is 20 kg
2. Find
the weight of an object placed on a raft on water where the dimensions of the
raft are known ( ex 3m X 1m X .5 m) and
the depth that you sink in water when loaded is known. Ex 2.0
cm.
3. Find
a buoyant force of a sunken object given the weight in air and the apparent or
net weight in the fluid.
4. Find the density of the object in #3 given the density of the
fluid and the results from #3.
5. Find the new velocity of a fluid in a pipe of
known diameter after coming from another diameter where the velocity was known.
Ex
1” pipe at 4.0 m/s to ½ inch diameter
pipe.
6. Find gauge pressure given total pressure and
atmospheric pressure
7. Find the force exerted on a hydraulic lift
where the radius of both pistons is known as is the weight of the object to be
lifted
8. Explain the physics of sailing. Specifically, explain how a sailboat goes
forward best when wind blows from the side.
You must explain with diagrams and bernoulli’s principle and vector
analysis and explain the relevant parts of the boat like hull, sail, keel.
9. Find the depth in a particular fluid like alcohol or water
where the pressure is a multiple of atmospheric. Ex 20 X atmospheric
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